Gun sling swivel



F. A, PACHMAYR GUN SLING SWIVEL Jan. 4, 1966 Filed May 25, 1964 I NVEN TOR. PACHA/1,4 Y@

ATTORN EV United States Patent O 3,226,872 GUN SLIG SWIVEL Frank A. Pachmayr, 4215 Ince Blvd., Culver City, Calif. Filed May 25, 1964, Ser. No. 369,943 2 Claims. (Cl. 42-85) This invention relates to an improved type of sling swivel structure for securing a sling to a rie or other firearm.

The general object of the invention is to provide a swivel which is very easily detachable from the iirearm to which it is connected, so that the sling may be readily detached when it is desired to use the gun without a sling; In spite of this easy detachability, however, it is a more particular object of the invention to so form the swivel that, when the sling is attached to the gun, the swivel is effectively held in a predetermined orientation relative to the gun, to extend transversely thereof in a manner best positioning the retained ends of the sling. Further, a swivel embodying the invention attains these results with an extremely simple structure, which is economical to manufacture and operationally reliable for extended use under rough treatment conditions.

structurally, a swivel embodying the invention includes a hollow mounting member which may be permanently secured to the gun, and to which a sling mounting loop part is detachably securable. The loop has a shank projecting therefrom and having an inner end adapted to extend through an aperture in the mounting member and into the interior thereof. The shank carries a cross piece which is received in the hollow member and is shaped to pass through the aperture in the hollow member in one orientation relative thereto, but is receivable within a detent notch in another orientation, to retain the shank and loop against separation from the mounting member. Within the interior of the mounting member, there is contained a spring which yieldingly urges the cross piece or the head of the loop carried shank into the detent notch, to thus releasably retain the loop against separation from the mounting member. To detach the loop and carried sling, it is necessary merely to turn the loop through a predetermined angle, usually 90 degrees, to allow its cross piece to pass through the aperture for complete removal of the sling.

Certain speciiic forms of the invention differ in the manner of connecting the mounting member to the gun, and in one form of the invention, the moutig member is purposely formed of two sections, one of which is separable from the other by a releasable connection, to allow access to the interior of the mounting member for securing it to the gun.

The above and other features and objects of the invention will be better understood from the following detailed description of the typical embodiments illustrated in the accompanying drawing, in which:

FIG. l is a side view of a ritie having a sling mounted at its front and rear ends by two swivels constructed in accordance with the invention;

FIG. 2 is a fragmentary enlarged vertical section taken on line 2-2 of FIG. 1, but showing the sling connecting loop detached from the mounting member;

FIG. 3 is a View taken on line 3 3 of FIG. 2;

FIG. 4 is a view similar to FIG. 2, but showing the loop attached to the mounting member;

FIGS. 5 and 6 are sections taken on lines 5 5 and 6--6 respectively of FIG. 4;

FIG. 7 is a view showing the rear sling of the FIG. 1

sun;

FIG. 8 is a fragmentary view similar to FIG. 2, but showing a variational manner of connecting the mounting member to the gun;

ICC

FIG. 9 is a view similar to FIG. 4, but showing another variation of the invention;

FIGS. l0 and 1l are sections taken on lines 10-10 and 11-11 respectively of FIG. 9; and

FIG. l2 is a view similar to FIG. 2 of another form of the invention.

In FIG. l, I have shown at 10 a conventional rifle, whose wooden body 11 has the usual forearm portion 12 carrying barrel 13, and the usual butt stock portion 13. A conventional sling 14 takes the form of a flexible strap whose opposite ends are attached to the forearm 12 and butt stock 13 by two swivel assemblies 15 and 16 respectively.

The swivel assemblies 15 and 16 of FIG. l are structurally very similar, except as to their manner of attachment to the woden body of the gun. FIGS. 2 through 6 illustrate in det-ail the structure of the forward assemby 15, while FIG. 7 illustrates the different manner of attachment for the rear assembly 16. With reference to FIGS. 2 through 6, it is noted in FIG. 2 that the forearm 12 has a typically cylindrical recess 18 in its upper surface beneath barrel 13. This recess is utilized for reception of a nut 19 by which the forward sling swivel assembly 15 is secured to forearm 12. Nut 19 may have an essentially cylindrical outer surface which fits closely within recess 1S, and has slightly oversize axial serrations 11S biting into the wall of recess 18 to retain the nut in fixed position in the recess and against rotation therein. Assembly 15 includes a mounting member or section 20 having a cylindrical main portion 21 centered about a vertical axis 22 extending upwardly through the center of the barrel, and received and fitting closely within a recess 121 in stock 11, flush with its undersurface 122. Formed integrally with cylindrical portion 21 of the mounting member, there is provided a reduced diameter upwardly projecting shank 23, which extends upwardly through a passage 24 in forearm 12, and has an upper threaded end 25 threadedly connected to nut 19 to secure member 20 to the forearm. At the juncture of cylindrical portion 21 and shank portion 23 of mounting member 20, this member has a transverse annular shoulder 26 which bears upwardly against a shoulder 123 in the forearm annularly about axis 22, to form a rigid connection positively holding member 20 in fixed position.

At its lower end, cylindrical portion 21 of mounting member 20 carries a transverse bottom wall 27, which is rigidly secured in some manner to portion 21, as by brazing, upsetting the lower end of portion 21, or other means. Member 27 is iiush with the undersurface of the stock or body 11, and has an elongated aperture 28 extending upwardly therethrough, of the outline configuration illustrated in FIG. 3, with the longer dimension 29 of this aperture extending in a front to rear direction relative to the gun, that is, in a direction parallel to the front to rear axis represented at 30 in FIGS. 1 and 3. The width 31 of aperture 23, transveisely of the front to rear axis 30, is substantially smaller than its length 29, so that a cross piece 32 of a detachable loop member 33 may pass upwardly through aperture 28 in one relative orientation, but not in a predetermined turned condition.

Loop member 33 has an elongated loop portion 34 (FIG. 4) to which strap 14 is secured, and which loop lies in a plane 35 (FIG. l) disposed transversely of front to rear axis 30, when member 33 is attached to mounting member 2) and the gun in the condition of use of member 30 and the sling. Loop 34 rigidly carries a shank 36 .which projects upwardly along axis 22, and which rigidly carries the transverse cross piece 32 disposed transversely of axis 30 and parallel to the upper and lower main parallel elongated portions 37 and 38 of loop 34. Cross piece 32 preferably has the circular cross section illustrated in FIGS. 2 and 6, to present a cylindrical external surface having portions projecting at opposite sides of shank 3d, for engagement with end wall member 27 of the mounting structure, The parts 34 and 36 may also be of similar circular or cylindrical cross section.

As will be apparent from FIG. 5, cross piece 32 is shaped to pass upwardly through aperture 28 in the broken line position 32 of FIG. 5. After the cross piece 32 has passed upwardly through aperture 28, and is above the upper surface of wall member 27, loop element 33 may be turned about axis 22 to the full line position of FIG. 5, in which the projecting ends of cross piece 32 are engageable with wall 27 to prevent downward movement of cross piece 32. In this position, in which cross piece 32 is preferably turned 90 degrees about axis 22 from the broken line inserting position 32 of FIG. 5, the ends of cross piece 32 are receivable within a pair of detent notches 39 formed in the upper otherwise planar surface 40 of member 27, to relasably retain cross piece 32 and the attached shank 36 and loop against returning rotary movement to the broken line position of FIG. 5. Notches 39 are of partial cylindrical configuration, corresponding to the external shape of cross piece 32 (se-e FIG. 6), so that the cross piece 32 may swivel readily about axis il of cross `piece 32, between the different broken line positions 36 of FIG. 2.

To yieldingly hold cross piece 32 in its confined position of partial reception within notches 39, portion 2l of mounting member 2t) contains a coil spring d2, which bears upwardly against the upper transverse wall surface 43 of portion 2l, and which bears downwardly against a circular disc 44, having a bottom surface 45 disposed transversely of axis 22.

Referring now to FIG. 7, the rear swivel assembly I6 connected to butt stock 13 of the gun may be considered as identical with the forward swivel assembly described in FIGS, 2 through 6, except that, in place of the upper machine screw type of mounting stud 23 in FIG. 2, mounting member 20a of FIG. 7 rigidly carries an upwardly projecting wood screw portion Attachment of member 20a and its contents to the butt stock may then be effected by merely turning member 2da about its axis 22a to screw the upper tapered threaded wood screw portion 23a into the wood of the gun butt stock.

To describe the manner of use of the gun of FIG. l, assume that mounting members 2@ and 29a of the forward and rear sling swivel assemblies I and 16 are permanently and rigidly secured to the forearm i2. and butt stocl I3 respectively of the gun, as illustrated in FIGS. 2 and 7. Also, assume that initially the loop members 33 at the front and rear of the gun are not secured to members 2i) and 20a. Further, it may be assumed that two of the loop members 33 are attached to the opposite ends of sling I4, and are at the outset carried with the sling but separately from the gun. When it is desired to attach sling I4 to the gun, the forward loop member 33 attached to the sling is positioned as shown in FIG. 2, so that upper cross piece 32 is in the broken line position 32' of FIG. 5, and the cross piece is then pushed upwardly through aperture 2@ and against disc 44, to force that disc upwardly against the tendency of the spring 42 until cross piece 32 may be turned about axis 2v2 to the locking full line FIG. 5 position of the cross piece. In that position, the opposite ends of the cross pece are received within notches 39, and are pressed downwardly within those notches by disc 44 under the iniiuence of spring 42. Thus, the loop member 33 is yieldingly retainined in xed position relative to mounting member 2t?, except that member 33 is free for swivelling movement to the broken line position of FIG. 6, in accordance with corresponding movements of the end of the sling. The rear end of the sling is attached to the mounting ymember 2@ of the second swivel assembly 16, in the same manner discussed above in connection with the forward assembly, so that both ends of the sling are effectively secured to the gun, but with their loop members 33 being free for limited swivelling movement about axis 41 of the cross piece.

When it is desired to remove the sling, the above process may be reversed, by simply pushing upwardly on loop members 33 to move their cross pieces out of notches 39, and then turning the loop members until their cross pieces may pass downwardly through apertures 28 of members 20. If preferred, loops 33 may be freed by merely exerting sufficient turning force, without upward force, to

cause the curved cylindrical surfaces of cross piece 32 to be cammed upwardly by the curved surfaces of detent notches 39, so that the loop may be turned to the proper removal orientation.

FIG. 8 shows a slightly variational form of the invention which is the same as the first form except inthe following particulars. Specifically, in FIG. 8 mounting member 2011 is secured to forearm 12b by a machine screw 23h which extends downwardly through passage 24h in the forearm, and is threadedly connected at 12e-b into a threaded bore 46 formed in member 201'). Head 1% of screw 23h is received within recess ISb in the forearm, and bears downwardly against a shoulder 47 formed in that recess, to tighten member lb upwardly within recess 12M in the forearm. In this form, the outer surface of element 2Gb is also illustrated as having axial serrations 129i), which bite into the wall of recess 12M? to prevent rotation of element 2019. Similar serrations may be provided in any of the other forms of the device.

FIGS. 9 to 1l show another form of swivel assembly ISC which is similar to that shown in FIGS. l through 6, but has been adapted for use at both the front and rear ends of the gun body. This swivel assembly includes a mounting member body 20c which is very similar to body 2@ of FIG. 2, but is secured to the forearm or butt stock portion of the gun body by a screw 23C having a head i230 received within body 2de. The threaded shank of screw 23e extends upwardly through an opening in top wall 43e of member 26C and may be either a wood screw as shown in FIG. 7 or a machine screw element such as that shown at 23 in FIG. 2 for attaching body 29C rigidly to the gun body.

Instead of bottom transverse wall 27 of FIG. 2, the FIGS. 9 through l1 form of the invention includes a detachable member 27C having a tubular upwardly projecting portion 48 which is detachably connectible to the cylindrical side wall of member 20c. To allow for this detachable connection, cylindrical wall 4.8 of member 27C contains a I slot 49 (FIG. l0), which coacts with a lug 59 formed by inward deformation of the cylindrical side wall of member tlc to form a quickly releasable bayonet connection between parts 27C and 29C. The bottom transverse portion IZc of member 27e contains an aperture 28C shaped as is aperture 2S of FIG. 2, with notches 39C being provided for reception of opposite ends of cross piece 32C which corresponds to cross piece 32 of FIG. 2. Shank 36e may carry loop 34C in a manner allowing swivelling movement of that loop about an axis 5I (FIG. 9), by reception of the aligned cylindrical ends 52 of loop 34C within correspondingly cylindrical recesses 53 in an enlargement 54 rigidly carried by and attached to shank 36C. As in the first form of the invention, a spring 42C urges a disc 4c downwardly against cross piece 32C.

When loop 34C and its connected parts of FIG. 9 are in their mounted positions of attachment to member 2de lug 50 of member 29e is received in the position of FIG. 10, within the closed end 55 of I slot 49. Thus, this lug retains member 27C and the connected parts against downward separation from part 20c. In this condition, the long dimension of loop 34e is disposed transversely of the main front to rear axis of the gun, as discussed in connection with the first form of the invention. Also, member 36e may swivel about the axis of cross piece 32C, and loop 3de may swivel about axis 5I, both of which axes are disposed transversely of the front to rear axis of the gun. When it is desired to remove loop 34C and the sling from the gun, this may be effected in the manner previously discussed, by merely pushing cross piece 32C slightly upwardly, turning, it, and allowing it to pass downwardly through aperture 28e. If it is desired to remove part 27C, this may be eected by moving part 27c upwardly and then rotatively so that lug 50 of FIG. 10 passes along the I slot 49 to its open end 56, thus freeing part 27C from part 20c. Such removal of part 27e allows access to the head of screw 23C, for initial connection 'of part 20c to the gun, or for removal thereof.

FIG. 12 is a view similar to FIG. 2, but showing another form of the invention, in which the cylindrical body 20d has external threads 12M for-med on its outer surface which are adapted to cut mating internal threads in the inner wall of recess 121d to secure element 20d in that recess of body 11d without the necessity for any additional fasteners. The element 20d may be screwed into recess 121d in any suitable manner, as by means of a screw driver received within the lower non-circular opening designated 28 in FIG. 2. Threads 120d may be a suciently tight fit within recess 121d to positively prevent movement of element 20d relative to body 11d after installation of element 20d. Internally, the element 20d may carry the same spring and other aprts as are shown in FIG. 2, for detachable reception of the swivel element 33d in the same nanner discussed hereinabove.

I claim:

1. A gun sling "swivel comprising a hollow mounting member adapted ,to be secured to a gun, a part detachably connectible to said member and forming an end wall thereof containing an aperture, a sling loop adapted to receive and hold a gun sling, a shank projecting from said loop and having an inner end extending through said aperture and into said hollow mounting member, a cross piece carried by said inner end of the shank and received in said hollow mounting member, said aperture being elongated to pass said cross piece in one position thereof but not when said cross piece and shank and said loop are turned through a predetermined angle to a second position, said end wall having a detent notch at its inner side for partially receiving said cross piece and retaining it and said shank and loop in said second position and against detachment from the mounting member, a spring within said mounting member urging said cross piece against said end wall and into said notch, and a quickly releasable bayonet connection securing said part to said hollow mounting member.

2. A gun sling swivel comprising a hollow mounting member having a tubular side wall and inner and outer essentially transverse end walls, a threaded fastener for securing said inner end Wall and thereby said mounting member to a gun, said outer end wall' containing an aperture, an elongated sling loop having two generally parallel elongated portions interconnected at their ends by two shorter return bends, a shank projecting from said loop and having an inner end extending through said aperture and into said hollow counting member, a cross piece carried by said inner end of the shank and received in said hollow mounting member and having opposite ends projecting in opposite directions essentially parallel to said elongated portions of said loop, said aperture being elongated to pass said cross piece in one position thereof but not when said cross piece and shank and loop are turned through a predetermined angle to a secon-d position, said outer end wall containing two aligned detent notches at its iner side for partially receiving opposite ends of said eross piece and retaining the latter and said shank andvloop in said second position and against detachment from the mounting member, an element in said mounting member for pressing said cross piece into said notches, a coil spring within said mounting member between and acting against said inner end wall and said element and urging said element against said cross piece, said mounting member including a separable part forming said outer end wall and having a sleeve portion projecting into said tubular Iside `wall and removable therefrom, and a detachable bayonet connection between said tubular side wall and said sleeve.

References Cited by the Examiner UNITED STATES PATENTS 2,078,591 4/1937 Sprague 42-85 2,642,689 6/1953 Cline 42--85 2,758,440 8/1956 Magid 42-85 3,061,965 11/1962 Lewis 42-85 OTHER REFERENCES Anschutz: German printed application, No. A 19,856, Pub. 2423456, 42-85.

SAMUEL FEINBERG, Primary Examiner.

BENJAMIN A. BORCHELT, Examiner. 

1. A GUN SLING SWIVEL COMPRISING A HOLLOW MOUNTING MEMBER ADAPTED TO BE SECURED TO A GUN, A PART DETACHABLY CONNECTIBLE TO SAID MEMBER AND FORMING AN END WALL THEREOF CONTAINING AN APERTURE, A SLING LOOP ADAPTED TO RECEIVE AND HOLD A GUN SLING, A SHANK PROJECTING FROM SAID LOOP AND HAVING AN INNER AND EXTENDING THROUGH SAID APERTURE AND INTO SAID HOLLOW MOUNTING MEMBER, A CROSS PIECE CARRIED BY SAID INNER END OF THE SHANK AND RECEIVED IN SAID HOLLOW MOUNTING MEMBER, SAID APERTURE BEING ELONGATED TO PASS SAID CROSS PIECE IN ONE DIRECTION THEREOF BUT NOT WHEN SAID CROSS PIECE AND SHANK AND SAID LOOP ARE TURNED THROUGH A PREDETERMINED ANGLE TO A SECOND POSITION, SAID END WALL HAVING A DETENT NOTCH AT ITS INNER SIDE FOR PARTIALLY RECIEVING AND CROSS PIECE AND RETAINING IT AND SAID SHANK AND LOOP IN SAID SECOND POSITION AND AGAINST DETACHMENT FROM THE MOUNTING MEMBER, A SPRING WITHIN SAID MOUNTING MEMBER URGING SAID CROSS PIECE AGAINST SAID END WALL AND INTO SAID NOTCH, AND A QUICKLY RELEASABLE BAYONET CONNECTION SECURING SAID PART TO SAID HOLLOW MOUNTING MEMBER. 